Multi-Family Property

What Is a Multi-Family Property?

A multi-family property is any residential building with two or more separate housing units under one roof or on one parcel. This ranges from duplexes and triplexes to large apartment complexes with hundreds of units. For investors, the critical dividing line is between 1-4 units, which are classified as residential, and 5+ units, which are classified as commercial. This distinction affects financing, valuation, and management approach.

Residential Multi-Family: 2-4 Units

Properties with 2-4 units qualify for residential financing, including FHA loans with as little as 3.5% down if you live in one of the units. This makes small multi-family properties the ideal entry point for new investors through house hacking. You live in one unit and rent out the others, often covering your entire mortgage payment with rental income. Conventional investment loans on 2-4 unit properties typically require 20-25% down.

Duplexes, triplexes, and fourplexes are valued using comparable sales just like single-family homes, which means appraisals are based on what similar properties have sold for rather than income production. This can work in your favor if you find a property with below-market rents that you can increase after purchase.

Commercial Multi-Family: 5+ Units

Properties with five or more units enter commercial territory. They are valued based on income using the cap rate formula (NOI / Cap Rate = Value), which means increasing income or reducing expenses directly increases property value. Commercial financing requires larger down payments (typically 25-30%), shorter loan terms (5-10 year balloons with 25-30 year amortization), and is underwritten based on the property's income rather than the borrower's personal income.

Economies of Scale

Multi-family properties offer significant economies of scale compared to single-family rentals. One roof covers multiple units. One plumbing stack serves multiple kitchens. One property management visit handles multiple tenants. Marketing costs are spread across more units. This efficiency advantage grows with size, which is why per-unit operating costs tend to decline as properties get larger.

Price Per Unit Analysis

When evaluating multi-family properties, price per unit is a quick comparison metric. A fourplex at $400,000 has a price per unit of $100,000, while a 10-unit building at $800,000 has a price per unit of $80,000. All else being equal, the lower price per unit offers more opportunity, though unit size, condition, and location must also be factored in. Comparing price per unit across similar properties in the same market quickly identifies potential deals.

Why Multi-Family Is Popular

Multi-family investing is popular because it is easier to achieve positive cash flow than with single-family rentals. Multiple income streams from one property reduce vacancy risk since one vacant unit does not eliminate 100% of your income. Scaling is faster because acquiring one 8-unit building is more efficient than buying eight individual houses. For these reasons, many investors start with small multi-family properties and scale into larger commercial multi-family as their experience and capital grow.